6544989 has 16 divisors (see below), whose sum is σ = 10578240. Its totient is φ = 3966480.

The previous prime is 6544943. The next prime is 6545003. The reversal of 6544989 is 9894456.

It is a happy number.

It is not a de Polignac number, because 6544989 - 2⁷ = 6544861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6544919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10722 + ... + 11315.

It is an arithmetic number, because the mean of its divisors is an integer number (661140).

Almost surely, 2^6544989 is an apocalyptic number.

It is an amenable number.

6544989 is a deficient number, since it is larger than the sum of its proper divisors (4033251).

6544989 is a wasteful number, since it uses less digits than its factorization.

6544989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22057 (or 22051 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 6544989 is about 2558.3176112438. The cubic root of 6544989 is about 187.0551373533.

It can be divided in two parts, 65 and 44989, that added together give a palindrome (45054).

The spelling of 6544989 in words is "six million, five hundred forty-four thousand, nine hundred eighty-nine".